Gumming device for bag-making machines.



L. l. BERGERON.

GUMMING DEVICE FOR BAG MAKING MACHINES. APPLICATION FILED JULY 10, 1914.

1,174,045. E 1 Fig.1;

Witnesses. Inventor. f. Leander LBer-geron, @5 1 ,Q YfiM/u! mafimwt Attys.

Patented Mar. 7, 1916.

L. l. summon.

GUMMING DEVICE FOR BAG MAKING MACHINES.

APPLICATION FILED JULY10, 1914.

1,174,045. Patented Mar. 7,1916. 2 SHEETS-SHEET 2.

WiTnesses. v Inventor.

7 Leander L Bergeronv, MC), yiwSMaW AUys.

UNITED STATES PATENT OFFICE.

LEANDER I. BERGERON, OF FITCITBURG, MASSACHUSETTS, ASSIGNOR TO BROWN BAG FILLING- MACHINE COMPANY, OF FITCHBURG, MASSACHUSETTS, A CORPORATION 4 OF MASSACHUSETTS.

GUMMING DEVICE FOR BAG-MAKING MACHINES.

Application filed July 10,1914. Serial Ila-850,136.

To all whom it may concern:

Be it known that I, LEANDER I; BnRoERoN, a citizen of the United States, and resident of Fitchburg, county of Worcester, and State of Massachusetts, have invented an Improvement in Gumming Devices for Bag- Making Machines, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to bag making machines and more particularly to a guinming device therefor.

- The invention has vide an improved gumming device whereby the gumunay be applied in a continuous line along the portions to which it is ap plied.

Another object is to provide'an improved mechanism for carrying the freshly gummed blanks from the plate to the creasing box.

Another object is to provide improvements of this nature which may be applied to machines as usually constructed with comparatively simple alterations. V

The gum pads of pickers as usually constructed are arranged to apply gum in spots along the portions to be gummed and the plate is provided with series of holes through which the gum pads operate, it being necessary to provide grids between such holes in order to strip the blank from the picker. Bags made upon such machines are unsatisfactory for containing fine material for the reason that it will sift out through the ungummed portions of the flaps.

In accordance with my invention I provide means to hold the blanks in position beneath the plate thus making it possible to provide continuous gum pads extending the full length of the portions to be gummed. By providing the means for holding the blanks in position beneath'the plate, I am enabled to employ gum pads extending continuously the full length of the portions to be gummed and such holding means'prevents the blank being drawn opening in the plate or otherwise displaced by the action of the picker. I

Another feature of my invention consists in providing projections on the under face of the plate and in so positioning the carrier that the forward jaw of the carrier Wlll e S pecification of Iietters Patent.

for an object pro through ,the

Patented Mar. '7, 1916.

tend slightly above the plane of said proect ons thereby flexing the blank and placlllg lii under tension as the carrier'moves to posltion beneath the plate. As the jaw passes the further edge of the blank, the blank is released and because of the tension it springs downwardly into place in front of the jaw. The carrier thus acts positively to remove the blank from beneath the plate. The nature and objects of the invention WllhIIlOIG fully appear from the following specification and accompanying .drawings in which the invention will be fully disclosed and the novel features will be par,- ticularly pointed out in the claims.

Referring to the drawings in which I and Fig. 7 is a plan view ofthe blank showing where the gum is applied to the flaps.

Referring to the drawings in detail, 1 designates the table of a bag making machine. An elevator of usual construction is indicated at 2 and is provided to hold a pile of blanks 3 in proper position in usual manl designates the plate rigidly held in position upon the machine in the usual manner. Above the plate a picker rod 5 is "mounted to slide vertically in the frame 6.

The picker carried by the picker rod comprises gum pads 7,8 and these are positioned to operate through slots 9,10, in the plate 4. A gum box 11 having a, gum boxroll 12 is providedas usual and the gum roll 13 operates to apply gum to the pads 7, 8. A feeler rock shaft l l having a feeler' 15 secured thereto, operates in the usual manner and cooperates with the elevator to maintain the top of the pile of blanks at a fixed. height relative to the plate. As this mechanism forms no part of my present inthe drawings.

vcntion it is merely indicated generally in The slots 9', 10, m the plate are continu.-

one and correspond in length with the extent of the flaps 16, 17 to be gummed, the position of the blank being indicated in dotted lines in Fig. 3. As usually constructed, these slots are not continuous but are interrupted at intervals by grids extending across the slots to provide means for stripping the blanks from the picker as the picker rises. The gum pads of the picker are usually correspondingly made in sections and apply the gum in spots rather than in a continuous line. In accordance with my invention I provide means for holding the blanks in position beneath the plate as the picker rises and draws through the slots, thuspreventing the blank being either drawn through the slots or displaced from its true position upon the under side of the plate. Accordingly I am enabled to dispense with the grids and the gum pads may be made continuous and of a length equal to the surface to be gummed.

The means illustrated for holding the blank in position beneath the plate comprises a pair of pivoted clamps 18 and 19 which operate to hold the blank against the plate and operating arms 20 and 21 rigidly connected to rock shaft 22. The clamps may be pivoted to the plate in any suitable manner. In the construction illustrated the plate is provided with similar holes 23. Blocks 24- and 25 having projections fitting into these holes are secured to the plate as by screws and the clamps each havingaprojection extending into the corresponding hole are pivoted to the blocks. In order to provide the necessary rock shaft for operating these arms, and at the same timeto retain the usual feeler rock shaft, I provide a feeler rock shaft 14 and an alined rock shaft 22 meeting at 26. A sleeve shaft 28 forms a continuation of shaft 22 beingrigidly secured thereto as by a pin 29 and extends to provide a bearing for the end of the shaft 14. The construction thus provides sufficient support for both rock shafts so that they may be mounted in the brackets 80. 31 and supported with sufficient rigidity without an intermediate hearing. The rock shaft 22 is operated by an arm 32 and link 33 extending to any suitable operating mechanism.

The usual creasing box is illustrated at 34, and 3.3 designates a plunger positioned above the creasing box as usual. Carriers 36 are slidably mounted in the creasing box in the usual manner. In order to cause the carriers to operate with greater certainty I provide ribs 37 and 88 on the lower face of the plate. The ribs extend slightly below the level of the top face of the forward jaws 39 of the carriers so that as the carriers move forward while the blank is in position against the plate the jaws, extending above the plane of the lower face of the ribs fies the blank upwardly under tension and as the jaws pass beyond the farther edge of the blank, the blank being released, snaps quickly down in front of the jaw. Thus as the carrier is again withdrawn the blank is sure to be in position between the jaws thereof and the rear jaws 40 of the carriers are operated in theusual manner, that is, projections 41 secured to rods 42 connected to the jaws engage stops 43 as the carriers move forward, thus holding these jaws retracted and therefore open as the carrier moves to its final position. In Fig. 5, I have illustrated the position of the forward carrier jaws in dotted lines, to indicate clearly that the jaws of the carrier extend slightly above the plane of the lower face of the ribs 37 38 on the plate 4, whereby the blank will be flexed under tension as the jaws move beneath the plate.

The device is adapted to be applied to a bag making machine of usual construction with comparatively little alteration. Accordingly the usual parts of the machine have been shown only with sufficient clearness torindicate the application of the invention. I have illustrated in Fig. 7 one form of blank 3 and at 44, 45 I have indicated gum extending in a continuous line the full length of the flaps 16, 17 to illustrate the gumming produced by my improved mochanism as distinguished from the umming in spots resulting with a plate having grids extending across the slots.

The operation of my device is as follows: The pile of blanks is supported upon the elevator 2 in the usual manner the top of the pile being maintained at a constant level by mechanism of well known and usual construction. Upon operation of the machine the gum roll 13, moves across beneath the gum pads 7, 8, applying gumthereta The picker then descends, the gum pads operating through the slots 9, 10 in the, plate 4 to apply gum to the flaps of the bag. As

the picker rises it lifts a blank up against the plate and the arms 20, 21 secured to the rock shaft 22. operate to swing the clamps 18, 19 up against the blank. thereby clamping the blank against the ribs 37, 38. During the upward movement of the picker and before the gum pads are withdrawn through the slots 9, 10, the carriers 36 move forward beneath the blank. As the carriers move forward the jaws 39 flex the paper under 113 tension due to the relative position of the jaws above the plane of the lower faces of the ribs 37, 38 and as the jaws 39, pass beyond the farther edge of the blank. the blank snaps down in front of the jaws. During the forward movement of the carriers and just before the carriers reach the extreme position the stops 43 prevent further forward movement of the jaws 40 thus in effect opening the carrier jaws to take the blank. The carriers are then withdrawn carrying the blank to the creasing box in the usual manner.-

Having fully described my invention, what I claim as new and desire to obtain by' Letters Patent is:

1. In a device for applying gum to cer-' tain areas'o-f a blank, 3. plate having slots, means for supporting blanks in position beneath said plate, a picker having gum pads operable through 1 the slots in said plate to apply gum to a blank and to Pick up said blaqk and draw it against said plate,

means temporarily to clamp positively said- 3. In a device, for applying gem to ctr tain areas of ablank, a plate having continuous slots extending the length. of said sirens. means to Support blanks beneath said plate, with the areas to be gumrnedibeneath. said slots, a picker. havlng continuous gum pads extending the length of said slotsfand operable through the slots topick up ablank and draw it against said plate, a plurality of clamping means adapted temporarilyto clamp positively said blank againstthe plate and a carrier to remove said blank.

, 4. In a device for applying gum tothe flap portions of ablank a plate having continuous slots corresponding in lengthdand position to the flaps tobegurnined, a gumming'! device having continuous gum pads corresponding in,leng'th and position to said slots and to the flaps to be amma and operating through the slotsin said plate, a plurality of means operablejtemporarily to engage and hold the blank'agamst sald plate during the operation of the gumming device and a carrier to remove said blank. I

5. In a device for applying gum to the the flap portions of. a blank, a plate having continuous slots corresponding in length and osition to the flaps to be gurnrned, a. gumming device having continuous pads corresponding in length and positionto sa d slots and to the flaps to be gu mned andoperlitingthrough the slots in sa dplate, means for holding the blank against 7 said plate during the operating of the. gumming devlce said plate having projections front its lower face. a carrier having jaws projecting above the plane of the lower faces f said projec-.

tions and movable to and from a position beneath said plate and acting to bend the blank toward the plate under tension as the carrier moves to position beneath the plate and permitting the blank to snap down front of the jaw after said jaw moves past the edge of the blank.

6. In a bag making machine a fixed plate provided with slots, means for supporting blanks in a definite position beneath said plate with flaps beneath said slots, a picker having gum pads positioned to operate through said slots to apply to the flaps of a, blank and raise said blank against the plate, ribs upon the under side of said plate, plvoted clamps and means to operate said clamps to hold a blank a'gainstthe ribs of said plate, a carrier movable to and from a position beneath said plate to receive and remove the blank and having a jaw extending' abovethe. plane of the lower faces of said ribs, and actin temporarily to bend the blank toward the p ate under tension as the carrier moves to position beneath the plate and permitting theblankflto snap down in front of the jaw after said jaw moves past the edge of the blank.

7. In a mach' neof the character described, in combination a plate having, projecting ribs on its lower face and a carrier movable horizontally to and from a position beneath said plate to receive and remove a blank from. the lower faceof said plate and having a jaw projecting above the plane of the lower faces of said ribs and beveled at its forward end" whereby the blank is bent toward the plate under tension as the carrier moves to position beneath the plate.

. 8.. In a bag making machine a fixed plate having slots, ,means for supportingblanks in a definite position beneath said plate, with o the flaps beneath 'said slots, a picker having pads positioned to operate through said slots to apply gum to the flaps of a blank and raise ,said blank against the plate, said plate having ribs upon its under side, piv oted clamps movable toward said ribs, a rock shaft, arms secured thereto and operable thereby to move said clamps toward said ribs to hold'the blank in position, and a carrier. movable beneath said plate to receive the blank and having a jaw extending above the plane ofthe' lower faces of said ribs and acting temporarily, to bend the blank toward the/plate under tension as the carrier moves to position beneath the plate and per mitting the blank to snap down in front of the. jaw after said jaw moves past the edge time: blank. Y

9. bag-making machine comprising means for supporting a blank and means for applying gum in a continuous strip to said blank, means adapted to engage and clamp said blank to permit the removal of the guminin'g mechanism therefrom, acarrler having jaws adapted to receive the gummed blank, means for reciprocating said carrier and means upon said carrier adapted upon the forward movement thereof to flex the gummed blank whereby upon the release of the clamping means said blank Will spring into the receiving jaws of the carrier.

10. In a bag-making machine the combination with means for supporting a blank and means for applying gum in a continuous strip to said blank, of means adapted to engage and clamp said blank positively against displacement to permit the removal of the gumming mechanism therefrom, a carrier adapted to receive the gummed blank and means for actuating said carrier.

11. In a bag-making machine the combination with means for supporting a blank and means for applying gum in a continuous strip to said blank, of means adapted to engage and clamp said blank positively against displacement to permit the removal of the gumming mechanism therefrom without lateral displacement of said blank.

12. In a bag-making machine, in combination, a plate having slots, a gumming de- 1,174,,oas

vice operating through said slots, clamps to hold a blank temporarily in position beneath said plate and means intermittently to operate said clamps comprising alined rock shafts independently operablebut telescopically connected to provide mutual support Ill) and arms secured to one of said alined rock support for both shafts and a clamp-operating arm secured to said sleeve and spaced bearing supporting said alined rock shafts.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

LEANDER I. BERGERON. Witnesses:

BENJAMIN F. BROWN, C. H. BLOOD. 

